Tips to Gain Weight with a Fast Metabolism

5. Make Protein Shakes

Let’s do a little math. Weight-lifting + protein = muscle/weight gain. Weight-lifting causes muscle break-down. Protein is the stuff that builds muscles. Post-workout is the window in which you help your body decide what to do during the muscle-repair—or remodeling—phase. When you eat a lot of protein right after a workout, your body will take it and use it to build stronger and more functional muscle fibers. Protein bars, protein shakes, nuts, and seeds—these are all great things to bring to the gym with you so that you can chow down immediately after a workout.